P20 Digital Display Pressure Transmitter | 4-20mA & Local Readout
Industrial 4-20mA Pressure Transmitter with Direct Digital Readout
The P20 Digital Series combines high-accuracy pressure sensing (0.5% / 0.25% F.S.) with an integrated digital display for effortless local monitoring. Built with a fully welded 316L stainless steel isolated diaphragm, it delivers continuous analog signals (4-20mA, 0-10V) to your PLC or VFD while allowing technicians to verify live pressure on-site without external meters.
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Two Housing Form Factors: Compact inline display (P20-G) or heavy-duty process enclosure (P20-CD).
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Clear Local Indication: Configurable HD LCD or high-visibility 4-digit LED screen.
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Industrial Signal Outputs: Standard 2-wire 4-20mA, 0-10V, or optional HART protocol.
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Rugged & Reliable: 316L SS wetted parts, high overload protection (200% F.S.), and EMI/RFI shielding.
Description
Continuous Control + On-Site Visual Inspection
In automation plants, pressure transmitters are often buried inside piping corridors or remote machine skids. Standard blind sensors require technicians to hook up multimeters or check SCADA screens to verify calibration. The P20 Digital Series solves this by providing a reliable 4-20mA analog signal to your control loop alongside an immediate local visual readout.
Choose Your Housing Profile
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P20-G (Inline Compact Series): Features a plug-on digital head mounted directly between the sensor body and Hirschmann connector. Ideal for general industrial machinery, pump skids, and hydraulics where vertical space allows.
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P20-CD (Heavy Industrial Process Series): Features a rugged, cast-aluminum housing designed for severe outdoor or chemical environments requiring maximum environmental isolation and optional HART protocol communication.
Typical Applications
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Pumping Stations & Booster Systems: Offers real-time visual line monitoring for maintenance crews while sending precise 4-20mA feedback to VFDs for constant pressure control.
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Hydraulic Power Units (HPUs) & Presses: Monitors high-pressure oil lines subject to rapid pressure spikes, letting operators perform quick visual checks during system setup or troubleshooting.
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Water & Wastewater Treatment: Tracks line pressure across filtration skids, dosing systems, and filtration manifolds where local indication prevents manual gauge additions.
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Pneumatics & Air Compression: Replaces traditional mechanical dial gauges with high-accuracy digital readouts that won’t lose calibration due to system vibration.
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Chemical & Process Automation (P20-CD): Safely measures pressure in harsh process lines, offering HART digital integration and rugged environmental protection.
Features
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Direct Local Reading: Bright LCD or 4-digit LED display eliminates guesswork during field maintenance.
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316L Stainless Steel Wetted Parts: High chemical and oil compatibility with zero internal O-ring seal degradation.
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On-Field Adjustments: Zero-point and span calibration support for field re-ranging.
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Severe-Duty Shock Resistance: Withstands up to 200% overpressure and high vibration environments.
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Universal System Connectivity: Seamlessly integrates with Siemens, SAIA, WAGO, or Allen-Bradley PLC analog inputs.
Specification
| Parameter | P20-G (Inline Display) PDF | P20-CD (Process Housing) PDF |
| Pressure Ranges |
-1…0 to 0…1000 bar |
-1…0 to 0…1000 bar |
| Display Type |
HD LCD / 4-Digit LED |
HD LCD / 4-Digit LED |
| Accuracy Class |
±0.5% F.S. (Standard) | ±0.25% F.S. (Optional) |
±0.5% F.S. (Standard) | ±0.25% F.S. (Optional) |
| Output Signals |
4-20mA (2-wire), 0-5V, 1-5V |
4-20mA, 0-10V, 4-20mA + HART |
| Supply Voltage |
12-30V DC (4-20mA) |
12-30V DC / 24V DC |
| Wetted Materials |
316L Stainless Steel |
316L Stainless Steel |
| Housing Material |
316L Stainless Steel Body |
Heavy Cast Aluminum Alloy |
| Ingress Protection |
IP65 |
IP65 |
| Process Connections |
G1/4″, G1/2″, 1/4″ NPT, 1/2″ NPT |
G1/4″, G1/2″, M20x1.5, 1/2″ NPT |
FAQ
Q: What is the primary difference between the P20-G and P20-CD models?
A: The P20-G uses an inline, plug-on display head designed for compact industrial skids and general automation. The P20-CD features a heavy-duty cast-aluminum process housing designed for extreme plant environments and applications requiring HART digital communication.
Q: Does this transmitter require a separate power supply for the display screen?
A: No. The digital display is loop-powered directly from the standard 24V DC analog power supply (for 4-20mA models), requiring no additional wiring.
Q: Can I adjust the zero point and span on-site?
A: Yes. Both models feature convenient zero and span adjustment controls, allowing technical teams to re-zero the device during routine maintenance without specialized factory software.
Q: What if I need programmable switch outputs (relays) to trigger a pump automatically?
A: The P20 Digital Series is designed primarily for continuous analog measurement with a local display. If your system requires programmable relay switch points (PNP/NPN/Relay), explore our PW Series Digital Controllers.
Datasheet
P20 Digital Display Pressure Transmitter | 4-20mA & Local Readout:
